3, 16, 17-trisubstituted 1, 3, 5 (10)-estratrienes



United States Patent "ice 335512 3,213,084 The present steroids are insoluble in water and some- 3,I6,I7'TRISUBSTITUTED T what soluble in the usual organic solvents such as acetone, Robert Eugene Schaub, Paramus, and Martin Joseph ether etroleum eth he a d th Weiss, Oradell, N.J., assignors to American Cyauamid p e ne i e I Company, Stamford, Conn., a corporatio f M i The compounds of this invention are prepared from 16- No Drawing. Filed Nov. 18, 1964, Ser. No. 412,257 5 hydroxymethylene or 16-alkoxalyl derivatives of 3-lower 20 C 60- alkoxy-l7-oxo-l, 3,5(l0)estra-trienes by reaction with re- This is a continuation-in-part of application Serial No. agents such as hydroxylamine, thiosernicarbazide, N filed October 1963, and now abandonedalkyl, alkenyl, or aryl substituted thiosernicarbazides and h inVent inre1ateS to new sterqid coFnpounds- More 10 semicarbazide. The syntheses are preferably carried out f i 1t if to 3tl6til7'msubstltuted (10) by warming an alcoholic solution of the reagent and the as m memes an elf prepara steroid. The desired products are obtained by the usual The novel steroids of the present invention may be illustrated by the following formula: techniques of isolation, washing and crystallization, well known to those skilled in the art.

X The invention also specifically includes the related ringopened derivatives: 3'lower alkoxy-16a and 16,9-(N-lower fi alkoxyirninomethyl)estra-1, 3,5 (l0)-trien-l7-ones and 3- lower alkoxy-16u and lofl-[N-(l-lower alkylthioureido)- 20 iminomethy1]estra-1,3,5(10)-trien-17-ones and 3-lower alkoxy-16-(2' lower alkyl)thiosemicarbazidomethyleneestra-1,3,5'(10)-trien 17-ones. These compounds are prepared by treatment of a 16-hydroxymethylene-17-ket0ne With an o-lower alkyl hydroxylamine or an N -lower alkyl wherein R is selected from the group consisting of hydrothiosemicaibazide.

gen and lower alkyl; R is selected from the group C nsis Treatment with reagents of thev former class gives a ing of hydrogen and lower carbalkoxy and X 15 selected mixture f the epimeic 15, and 1 1 alkoxyimfrom the group wHSIStmg inomethyl derivatives (VIII and IX). With reagents of NH'mWer alkenyl the latter class the epirneic 16B- and l6u-(1-lower alkyl- (3:3 t-hioureido)i-minomethyl derivatives (X and XI) as the 1;. N- --N corresponding 16- (2-lower alkyl)thiosemicarbazidometh- NH-lower alkyl NH-phenyl ylene-derivative is formed.

=8 and =8 The following fi'owsheet illustrates the preparation of i steroids of the present invention.

FLOWSHEET m) no \N -GH-OH ii-11 I l HzNOH-HCI I HaCQ- H300- The estratriene derivatives of the present invention have estrogenic activity and are useful in estrogenic therapy and as agents for lowering blood cholesterol levels, hence as anti-atherosclerotic agents.

The following examples describe in detail the prepara- 5 tion of representative 3,16,17-trisubstituted 1,3,5 (10)- estrat'rienes of this invention.

Example I .--Preparation of 1 7a-hydroxy-3-meth0xyestra- 1,3,5 (10)trien0[16B,I 7B-d]-A -isxaz0line (II) ]D +105 1.40% in CHCL3) igg 224 60,. 69000), 200 01,. 61900), 200 31,1 61900), 2115 223 10,. 69300 230 01,. 61900 12,-1.3 NM 273 01,. 62150 205 (sh) 62120 135;. 3.00, 3.53, 0.20, 0.30, 0.01, 0.77, 0.35, 0.91, 9.12, 12.45,.

Example Il.--Preparation of 2'-carbam0yl-17a-hydroxy- 3-meth0xyestra 1,3,5 (10) trieno [175,1613-c] -A pyrazoline (III) A suspension of 1 g. of 16-hydroxymethyleneestrone methyl ether, 394 mg. of semicarbazide hydrochloride and 530 mg. of anhydrous sodium acetate in 30 ml. of absolute ethanol is heated at the refluxing temperatures for two hours, solution being complete at the boiling point. The solution at this point gives a deep red color when reacted with 1% ethanolic ferric chloride solution. The mixture is then allowed to stir at room temperature for 18 hours, after which period the test with 1% ethanolic ferric chloride is negative. The precipitated solid is collected and washed with water and then with absolute ethanol to give 1.02 g. (87%) of product, melting point 2l9220 C., dec. Recrystallization from methylene chloride-ether does not alter the melting point,

[@1325 +100 (0.47% in dioxane) XOHaOH 220 m (614,700), 270 Inn (61350 203 10,.

Example III.Preparati0n of 17a-hydr0xy-3-melhoxy-2- thiocarbamoylestra 1,3,5 trieno [I7,8,16 8-c]- A -pyraz0line (IV, RzH) A suspension of 1 g. of 16-hydroxymethyleneestrone methyl ether and 320 mg. of thiosemicarbazide in 30 ml. of absolute ethanol is heated at the reflux temperature for one hour. Solution is completed as the temperature approaches the boiling point and shortly thereafter solids begin to precipitate. After the heating period, the solution gives a negative test with 1% ethanolic ferric chloride solution. The solid is collected and washed several times with absolute alcohol to give 1.16 g. of product, melting point 223 C., dec. Recrystallization from acetone furnishes white crystals, with melting point of which is unchanged; [01],; 197 (0.54% in dioxane);

33 225 111;; (613,100), 230 01,. (612,900), 275 m (618,300); 13,15 w 225 m0 (612,300), 230 111,. 611,700), 272 m (015,600); NEE MOB 365 mp. (033,400); 1, 3 2.87, 2.99, 3.09, 0.22, 0.73, 7.40 1

Example I V.-Preparati0n of 17a-hydroxy-3-methoxy-2'- (N methylthiocarbamoyl)estra 1,3,5(10) trieno- [1713,16/3-0]-A -pyraz0line (IV, R CH Treatment of 500 mg. of 16-hydroxymethyleneestrone methyl ether in 20 ml. of absolute alcohol with mg. of 4-methylthiosemicarbazide in the manner described above for the preparation of 17a-hydroxy-3-methoxy-2- thiocarbamoylestra 1,3,5 10)-trieno- 17/8,16 9-c]-A pyrazoline (Example III) gives 422 mg. of product, melting point -l96 C., dec. Recrystallization from methylene chloride-ether furnishes white crystals, melting point 198-199 C., dec.; [011 -2l4 (1.0% in CHCI 22,35,9 223 m 610,200 230 111;: 610,100 and 272 mp (019,000); A2111, H01 223 mu (010,200), 230 mp (010,100)

and 272 mp (015,600); A3512 MOE 368 mp (030,800); M 1 3 Example V.Preparati0n 0f 17u-Izydr0xy-3-methoxy-2'- (N ethylthiocarbamoyl)estra 1,3,5(10) trieno- [175,1600]-A -pyraz0line (IV, R:C H

Treatment of 500 mg. of 16-hydroxymethyleneestrone methyl ether in 20 ml. of absolute alcohol with 210 mg. of 4-ethylthiosemicarbazide in the manner described above for the preparation of 17a-hydroxy-3-methoxy-2- thiocarbamoylestra 1,3,5(l0)-trieno-[ 1713,16,Bc] -A pyrazoline (Example III) gives 582 mg. of product, melting point 198199 C. dec. Recrystallization from methylene chloride-ether aifords white crystals, melting point 198200 C. dec.; [00],; 200 (1.0% in CHCl 15,513 222 111,. 610,700), 230 m 09,700) and 273 111,. (017.000); 19 53 222 m (010,400), 230 m (09,900) and 273 m (013,200); $1.5 368 m (028,200); REE 3.03, 6.20, 6.53, 9.13 1 Example VI.--Preparation of 17a-lzydroxy-3-methoxy-2'- (N,n butyllhiocarbamoyl)estra I,3,5(Z0) trieno- Treatment of 534 mg. of 16-hydroxymethyleneestr0ne methyl ether in 20 ml. of absolute alcohol with 275 mg. of 4-n-butylthiosemicarbazide in the manner described above for the preparation of 17a-hydroxy-3-methoxy-2- thiocarbamoylestra-1,3,5 10)-trieno-[17 3,16 8-c] A pyrazoline (Example III) gives 604 mg. of product, melting point 161165 C. Recrystallization from methylene chloride-ether furnishes white crystals, melting point 167- 169 C.; [01],; 179 (1% in CHClg);

15 53 222 my 612,000), 230 m (611,700 and 274 Example VII.Preparati0n 0f 1701-hydr0xy-3-meth0xy- 2 N -allythiocarbam0yl stra-1 ,3,5 (l 0 -trien0- [1 7,3, 16,8-0]-A -pyraz0line (IV, R=CH CH=CH Treatment of 500 mg. of 16-hydroxyrnethylene-estrone methyl ether in 20 ml. of absolute alcohol with 230 mg. of 4-allylthiosemicarbazide in the manner described above for the preparation of 17a-hydroxy-3-methoxy-2'-thiocarbamoyl estra-1,3,5(10)-trieno-[17p,16 3-c]-A -pyrazoline (Example III) affords 583 mg. of product, melting point 178180 C. Recrystallization from methylene chloride-ether gives white crystals, melting point 179- 181 C.; [a] 184 (1% in CHCl 1535 222 111,. 611,900 230 111,. 610,000) and 277 m (018,700); 19,15 222 m (012,700), 230 m (011,700) and 276 m (019,500); A2 1,}? 370 m (033,000); 3,55? 3.03, 6.20, 6.60, 9.15 1

Example VIIl.Preparati0n of J7a-hydroxy-3-meth0xy- 2'(N phenylthiocarbamoyl) estra-1,3,5(J0)-trien0- Treatment of 500 mg. of 1fi-hydroxymethylene-estrone methyl ether in 20 ml. of absolute alcohol with 295 mg. of 4-phenylthiosemicarbazide in the manner described above for the preparation of l7a-hydroxy-3-methoxy-2' thiocarbamoyl estra-1,3,5( 10)-trieno-[ 1713,165-c] -A pyrazoline (Example III) gives 319 mg. of product, melting point 159-160 C. dec. Recrystallization from methylene chloride-ether gives white crystals, melting point 160161 C. dec.; [21 209 (0.9% in 01101 139 221 m 618,000 230 m (613,100 and 278 m (623,000); 13 13 222 111,. (617,000), 230 m (613,100) and 278 m (618,200); N31,}? 278 m (612,000) and 383 m (634,400); x53; 3.02, 6.25, 6.60, 9.02, 13.35, 14.3511

Example IX.-Preparatin 0f 16-eth0xalyl derivative of 3 -meth0xy-1 ,3,5 -estratrien-1 7-0ne (V) To a solution of 1.14 g. (4 mmoles) of 3-methoxy-1,3, -estratrien-17-one in 120 ml. of anhydrous benzene is added 1.8 ml. ethyl oxalate and 0.43 g. of 50% sodium hydride-oil dispersion. The reaction is started by the addition of a few drops of ethanol and the mixture is stirred under nitrogen for 16 hours. The yellow suspension is extracted several times with cold 1% aqueous potassium hydroxide solution and the extracts are added to aqueous 30% sodium dihydrogen phosphate solution. This mixture in turn is extracted with several portions of chloroform until these extracts no longer give a positive enol test with ferric chloride solution. The combined chloroform extracts are washed with water, dried and evaporated. The residue is crystallized from ether to give 1.16 g. of a solid (strong positive enol test), melting point 140146 C. A sample recrystallized from acetone-hexane had a melting point 14ll45 C., [01],; +63.4;

13 5, 9 285 m 1 (69800 in 66161 298 m 611,600 in methanol); 302 m (620,600 in base); 15. 5.74 1. (s);

A suspension of 1 g. of the lG-ethoxalyl derivative of estrone-3-methyl ether ((V), Example IX) 200 mg. of hydroxylamine hydrochloride and 650 mg. of anhydrous sodium acetate in 30 ml. of absolute ethanol is stirred at the refluxing temperatures for 48 hours. The solution then gives a slightly positive enol test with 1% ethanolic ferric chloride, and is concentrated to a small volume under reduced pressure, Water is added and the solid is col lected by filtration to give 354 mg. (34%) of product, melting point 172-175 C. This material gives a negative enol test. Recrystallization from acetone-petroleum ether (boiling point 60-70) gives white crystals, melting point 175-176 C.; [06113 1.9 (1.1% in CHCl 1533,59 225 my 613,400 279 Inn (62400 and 288 m (62200); 13315 (613,400), 279 mu (62200) and 284 {Ii 52862000); 1362 279 m (62600), and 285 m Example Xl.Preparati0n of 16-hydr0xymethyleneestrone 3-ethyl ether .stirred at room temperature, under nitrogen atmosphere for 20 hours. After quenching with methanol the henzene solution is washed with 100 ml. of water, 200 ml. of 1% potassium hydroxide solution and finally with 100 ml. of water. The combined aqueous extracts are added to 175 m1. of saturated potassium dihydrogen phosphate solution. The resulting precipitate is extracted three times with methylene chloride and the combined extracts are washed with water, dried over anhydrous magnesium sulfate and evaporated to dryness under reduced pressure. The residual syrup is crystallized from methylene chloride-ether to give 4.71 g. of product, melting point 133 136 C. Recrystallization from the same solvent pair furnishes white crystals, melting point 132-135 C.; [071 +l40 (1% in CHCl Example XII.Preparation of 3-eth0xy-17or-hydroxy-T- thiocarbamoylestra 1,3,5 (10) trieno [1713,1630] A -pyraz0line mux.

13 5,59 222 m (614,000 230 m (614,000 and 273 Example XIII.Preparati0n of 3,17a-dihydr0xy-2'-thi0- carbamoylestra 1,3,5(10) trieno-[17 6,16/3-c]-A pyrazoline Treatment of 1 g. of 16-hydroxymethyleneestrone [Helv. Chim. Acta., 31, 1296 (1948)] in 40 ml. of absolute alcohol With 330 mg. of thiosemicarbazide in the manner described above for the preparation of 17a-hydroxy 3 methoxy 2' thiocarbamoylestra 1,3,5(10)- trieno [175,16B-c] A -pyrazo1ine (Example 111) affords 645 mg. of product, melting point 173-175 C. dec. Recrystallization from methylene chloride-ether does not alter the melting point; [011 2l8 (0.98% in dioxane);

xg jf 222 61,1 610,800 230 m (610,400) and 275 m (618,000); N,,;, 222 111;]. (611,300), 230 my. (610,600) and 275 m (617,500); 19515 240 m (613,000) and 365 m (631,400); )6 3.00, 6.28, 6.78

Example XIV.Preparati0n of 3 methoxy 16B (N- methoxyiminomethyl)eslra 1,3,5 (10) trz'en 17 one (VIII) and 3 methoxy 16a (N methoxyiminomethyl) estra-I,3,5(10)-trien-17-0ne (IX) A suspension of l g. of 16-hydroxymethyleneestrone methyl ether, 750 mg. of anhydrous sodium acetate and 294 mg. of methoxyamine hydrochloride in 30 ml. of absolute ethanol is stirred at the refluxing temperatures for one hour. The cooled solution is diluted with water, concentrated under reduced pressure to remove the ethanol and filtered to furnish 758 mg. of a mixture of (VIII) and (IX), melting point 133136 C. Recrystallization from acetone-petroleum ether gives White crystals, melting point l47 C.; [121 +145 (0.6% in CHCl 133;? 220 111,. 618,100 278 In 62200 and 288 m (62200) (no change in aging for 5 days); A113,}? 220 m (613,800), 282 m (66300) and 290 m l (65960); A9 1,? 319 m (611,700); A55; 5.73, 6.19, 6.34, 6.66 7.96, 9.62,, mm. v.

(Varian A-60 spectrometer, COCl solution, tetramethylsilane as internal standard): O -CH signals at 55 and 61 c.p.s., 232 c.p.s. (3-OCH N-OCH signals at 237 and 240 c.p.s., one proton doublet centered at 456.5 c.p.s. (1 5 c.p.s.,

no active hydrogen observed on exchange experiments with H O, the intensity ratio of the C -CH signal pair and of the N-OCH signal pair (each signal pair corresponds to one epimer), initially about 3 :1 approaches 2:1 on standing in COCl solution for up to two weeks.

Example X V.Preparatin of S-methoxy 165 [N-(I- methylthioureido)iminomethyllestra 1,3,5 (10)-trien- 17-0ne (X) and 3 methoxy 16a [N-(I-methylthioureid0)imin0methyl]estra 1,3,5(10) trien 17 one (XI) and 3 methoxy-16-(Z-methylthiosemicarbazido) methyleneestra-1,3,5 (10 trien-l 7-0ne (XII) xgggf 230 my (611,360) 242 111,. (69,500), 281 my.

(621,100) and 300 my. (shoulder) 14,200 xii: 2.93 3.05, 5.75, 6.20, 6.32, 9.12,.

Example X VI .Preparation of 3,17a-dihydr0xy-2'- (N- mel'lzylthiocarbamoyl) estra l,3,5(10)trien0 [17B, ldfl-c] -A -pyraz0line Treatment of 500 mg. of 16 hydroxymethyleneestrone in 20 ml. of absolute alcohol with 190 mg. of 4- methylthiosemicarbazide in the manner described above for the preparation of l7a-hydroxy-3-methoxy 2' thiocarbamoylestra 1,3,5 l 0)-trieno- 175,16fi-c] pyrazoline (Example III) alfords 558 mg. of product, melting point 219-221 C. dec. Trituration with methylene chloride followed by filtration gives white crystals, melting point 221 C. dec.; -175 (1.0% in dioxane);

We claim: 1. A steroid of the formula:

max.

OH X

wherein R is selected from the group consisting of hydro gen and lower alkyl; R is selected from the group consisting of hydrogen and lower carbalkoxy and X is selected from the group consisting of O,

NHQ NH; NH-lower alkenyl 0 S S 4a .N

NEE-lower alkyl NH-phenyl =s (1:8 41- and 3's- 2. 17a hydroxy 3 methoxyestra-l,3,5(10)-trierio- [16fi,17B-d]-A -isoXaZoline.

3. 2 carbamoyl a hydroxy 3 methoxyestra- 1,3 ,5 10) -trieno-[ 175,16fl-c] -A -pyraz0line.

4. 17a hydroxy 3 methoxy-2-thiocarbamoylestra- 1,3 ,5 10) trieno- 175,165-0] -A -pyrazoline.

5. 17a hydroxy 3 methoxy 2 (N-methylthiocarbamoyl)estra 1,3,5(10) trieno-[17fl,16fl-c]-A pyrazoline.

6. 17oz hydroxy 3 methoxy-2'-(N-allylthiocarbamoyl)estra-1,3 ,5(10)-trieno-[175,1613-c]-A -pyrazoline.

7. 3,170 dihydroxy 1' (N methylthiocarbamoyl)estr-a- 1,3,5(10)-trieno-[17,8,16,6-c]-A 'pyrazoline.

8. 3' carbethoxy 17o: hydroxy 3 methoxyestra- 1,3 ,5 10) -trieno-[ 16fl,17,B-d] -A -isoxazoline.

9. 170a hydroxy 3 ethoxy 2 thiocarbamoylestra- 1,3,5 10)-trieno- 17B, 1 6B-c] -A -pyrazoline.

10. 3,170; dihydroxy-Z'-thiocarbamoylestra-1,3,5(l0)- trieno-[17,8,16,8-c]-A -pyrazoline.

11. 3-lower alkoxy-16fl-(N-lower alkoxyiminomethyl) estra-l,3,5 (10) trien-17-one.

12. 3-methoxy 16B (N-methoxyiminomethyl)estra- 1,3,5 10) trien-17-one.

13. 3-lower alkoxy-16a-(N-lower alkoxyiminomethyl) estra-1,3 ,5 10) trien-l7-one.

14. 3 methoxy 16oz (N-methoxyiminomethyl)estra- 1,3,5(10)-trien-17-one.

15. 3-lower alkoxy-16fi-[N-(1-lower alkylthioureido) iminomethyl]estra-1,3,5(10)-trien-17-one.

16. 3 methoxy 16/3 [N-(l-methylthioureido)iminomethyl] estra-l,3,5 10)-trien-17-one.

17. 3-lower alkoxy-l6u-[N-(l-lower alkylthioureido) iminomethyl]estra-1,3,5(10)-trien-17-one.

18. 3 methoxy 16oz [N-(1-methylthioureido)iminomethyl]estra-1,3,5(10)-trien-17-one.

19. 3-lower alk0xy-16-(2-lower alkylthiosemicarbazido)methyleneestra-1,3,5 10)-trien-17-one.

20. 3 methoxy 16 (2 methylthiosemicarbazido) methylene-1,3 ,5 10) trien-17-one.

No references cited.

LEWIS GOTTS, Primary Examiner. 

1. A STEROID OF THE FORMULA: 